Town Hall Address 145 N. Pitt St. Mercer, PA 16137 United States- Mercer County Website http://mercerborough.com/ Deed Registry (724) 662-3800 http://www.mercerassessor.com/ias-portal Monday - Friday 8:30 am - 4:30 pm 109 Courthouse Mercer, PA 16137 United States Code Enforcement 724-734-9406 145 N. Pitt St. Mercer, PA 16137 United States Town Hall Hours M-F 8:00 A.M. – 4:30 P.M. County Mercer